Cryptograph.



PATBNTBDPEB. 26. 1907,

H. BURG.

GRYPTUGRAPH.' APPLIUATIOHIILED M1131. 1908.

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110.815,515. PATENTBD 1113.26, 1907.

H. BURG,

CRYPTOGRAPH. APPLIGATION FILED .11.11.31, 1906.

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M Mr@ Arm/Wim nm Hormis PETERS ca., wAsmNa'roN. n. c4

unir-nn stares Parana ernten CRYPTOGRAPH.

Specification of Lettersl Paten-t.

Patented Feb. 26, 1907.

Application led January 31, 1906. Serial No. 298.774.

In the device or apparatus each change of combination is produced by the displacement of a carriage which is reciprocated directly by hand, the extent ot' such reciprocation varying automaticallyT each time, according to a predetermined law, and this variable reciprocation of the carriage is transmitted to a crown ol letters movable concen-- trically with respect to a iixed crown o1v letters, the said crowns serving to make the cryptographic translations. Y

i In the accompanying drawing, which shows, by way of examples', two embodiments of this invention, Figure l is a side elevation, partly in section, of an apparatus constructed according to the present invention. Fic'. 2 is a plan of the same, certain parts oic the disks carrying the crowns of letters being broken away.y Figs.` 3 and 4 are similar views of an embodiment of greater simplicity in construction. y

In Figs. 1 and 2, the frame of the apparatus consists of a bed-plate a, which can be held in the hand and on which is secured a stud or swivel pin l). On. the-upper end. of the latter is fixedl-y secured a disk c, provided with a crown of letters d, which presents a series of letters, lign-res, or signs equally spaced apart. y

Rotatably mounted on the stud or swivel pin l) are, iirst, a disk e, carrying another crown of letters f and provided with ratchetteeth g; secondly, a ratchet-wheel h, secured to the disk e; thirdly, a toothed pinion fi, provided with a plate or segment j, carrying a pawl 7c, so arranged as to act on the wheel h; fourthly, a ratchet-wheel m, on which acts a stop-pawl n, mounted on the plate a and held in engagement with the wheel by spring n', and7 iit'thly, a segment o, carrying an actuating pawl or dog p, which acts on the wheel m, said pawl being held in engagement with thewheel by spring o. On the st ud or swivel pin b also is slidably mounted a carriage g, which is guided in a straight line by means of a slideway r, slidable on the stud b, and of a slideway s, slidable on a lixed stud t. The said carriage is provided with a handle u, by means Aof which it can be moved by hand, and with a `toothed rack e, meshing with the toothed pinion t'. One of the edges of the said carriage comprises an inclined plane fw. so arranged as to act on the rotary stem of the pawl or dogg)` and cause the latter to moveA forward to the extent of one of the teeth of the ratchet-wheel m. The carriage g is also provided with a pin designed to impinge against the fixed pins y, secured to the ratchet-wheel m.- The apparatus also comprises another stop-pawl e, mounted on the bed-plate c and acting on the teeth g to prevent the disk e from turning backward and from being carried onward by the momentum when turned forward. The pins y areV equaly in number to that of the teeth ot the ratchet-wheel m and arranged on radii corresponding to the said teeth at diiiferent distances from the center. y

On a reading being made on the crowns df in the position of rest shown in the rdrawings the handle u is pulled toward the right, so as to move the carriage g until the pin x impinges against the pinsy. Duringvthis movement the toothed rack v causes the toothed pinion i to revolve with the plate or segment jin an inverse direction to that of the arrow A, so that the pawl 7 rides on the wheel 7L and that the latter, as well as the disk e, remain motionless through the action of the pawl e. At the same time the inclined plane w has pushed back the segment o against the action of the retracting-spring n, so that the pawl or dogy p has caused the ratchet-wheel m to turn forward to the extent of one tooth andthat one of the pins y has come into the path of the pin a: before the latter has advanced above the ratchet-wheel m. Vhen the carriage has thus been brought to a stop by the pin y, it is pushed back to its initial position. This movement has the effect of causing the toothed pinion i to revolve in the direction of the arrow A to the extent of an angle corresponding to the stroke of the carriage. The pawl le then causes the wheel i to revolve to the extent of the same angle, as

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well as the disk e, so that the crown f takes up a fresh position with respect to thecrown d. A fresh reading can now be made on the said crowns to give the cryptographic trans-- can also be operated several times in'succession between two readings, according to a predetermined conventional code. At each operation of the carriage another pin y comes into the path of the pin so that the stroke of the carriage and the angle of rotation of the crown f vary each time.

5 By varying the positions of the pins y on the ratchet-wheel m there can be obtained a considerable number of combinations, each representing a law of succession of the different angles of rotation of the crown f.'

In the simplified embodiment of the invention (shown in Figs. 3 and 4) the bed-plate a carries a stud or swivel pin b', on which is fiXedly secured a disk c, carrying one of the crowns of letters d. The other crown of letters f is located on a disk e free to revolve on the stud b', and the periphery of which is provided with ratchet-teeth g against which acts a stop-pawl z. To' the disk e is secured a ratchet-wheel h', which can be revolved forward by a pawl or dog 1c', mounted on a plate j, secured on the toothed wheel i rlhe said toothed wheel, loosely mounted on the stud or swivel pin b, meshes with a toothed rack v cooperating with acarriage g', which is guided by a guideway r, slidable on the stud b', and by a handle u', slidable in the guideway s/ of the bed-plate a. Spiral springs a2 pull the carriage toward the right, so that the handle u tends to move away from another handle t', secured to the bedplate a. The handles u and t are so arranged that they can be grasped by the fingers of one hand and brought together by the same, so as to bring the carriage back to the left, as shown in the drawings, The stroke of the carriage to the right is limited by a pin impinging against the pins y', secured direct to the disk e', and itsstroke toward the left is limited by the length of the slideway 1".

When after a reading has been made on the crowns d f, the handles u and t being moved away from each other, the hand is closed in bringing the said handles together to the limit-of their inward strokes, as shown in the drawing, the displacement of the carriage toward the left revolves the toothed Wheel i in the direction of the arrow A. The pawl or dog c, which moves with the wheel t', carries Jforward the wheel h and the disk e in the same direction to the extent of an angle which corresponds to the stroke of the carriage. By relieving the pressure on the handles u and t the carriage is allowed to return toward the right under the action of the springs a? until the pin m impinges against the pin y', which has. just been brought into its path by the rotation of the disk e. During this return movement of the carriage the pawl or dog k jumps onto the wheel It and tne disk e 1s rendered motionless by the pawl e. Uonsequently at each pressure of the hand on the handles u and L the disk e is revolved to the extent of an angle which depends on the variable stroke allowed to tne carriage by the dii'erent pins y.

ln order that the rotation of the disk e shall not be stopped unseasonably by the impingement of a pin y against a lateral iace of the pin the latter may be mounted on a pivot x2 andV be held normally against a stop-pin ac3 by means or' a spring x4, so as to be enabled to yield tothe pressure of the pins y in the direction of the arrow A.

The hereinbei'ore apparatuses are intended to be held in the hand, but they may be provided with legs and thus become h'Xed ap paratuses.

I claiml. A cryptograph comprising a bed-plate, a stud or swivel pin iixedly secured on the bed-plate, a disk provided with letters secured on the said stud, a disk provided with letters revolving around the said stud, a ratchet-wheel on the last-named disk, a toothed wheel revolving around the stud, a pawl carried by the last-named toothed Wheel and which engages the ratchet-wheel, a carriage transversely slidable on the said stud and having a handle, a toothed rack on the said carriage meshing with the said toothed Wheel a ratchet-disk revolving around the said stud, pins on the said disk so arranged as to be successively met with by the carriage, and means for revolving the said ratchet-disk step by step at each reciprocation of the carriage to bring successively the pins into the path of the carriage.

2. A cryptograph comprising a bed-plate, a fixed spindle on the said plate, a fixed letter-disk on the said spindle, a letter-disk re volving on the said spindle, a ratchet-wheel on the latter disk, a tooth-wheel revolving on the spindle, a pawl carried by the said toothed wheel and engaging with the ratchetwheel, a carriage slidable transversely on the said spindle and having a handle, a toothed rack on the said carriage meshing with the said toothed wheel, an abutment on the said carriage, a series of pins at different distances from the spindle and on radial lines and adapted to be met successively by the abutment of the carriage, and means whereby the said series of pins are turned at each IOO IIO

reciprocatio'n of the carriage to bring a fresh pin infront of the abutment.

3. A cryptograph, comprising a fixed character-disk, a revoluble character-disk, a reciprocating member, means for operating the revoluble disk 'trom said member, and means controlled by the reciprocating member for varying the stroke o'l: said member.

4l. A cryptograph, comprising a xed character-disk, a revolnble character-disk, a reciprocating member, means lor operating the revolnble disk from the reciprocating member, a plurality of stops, and means -for bringing a stop in position to arrest the movement of the reciprocating member.

5. A cryptograph, comprising a lixed character-disk, a revoluble cl'iaracter-disk, a reciprocating member, means lor operating the revolnble disk from the said member, a plurality of stops, and means controlled by the reciprocating member to bring a stop in position to arrest the movement of said reciprocating member.

6. A cryptograpl'i, comprising a fixed character-disk, a revolnble character-disk, a reciprocating member, means for operating the revoluble disk from the reciprocating' member, a revolnble member carrying a plurality of stops, and means for operatingr the movable member to bring a stop thereof in position to arrest the movement of the reciprocating member.

7. A cryptograph, comprising a 'liXed character-disk, a revoluble character-disk, a reciprocating member, means for operating the revoluble disk from the reciprocating member, a revoluble member provided With a plurality of stops arranged at difierent distances from the center of said member, and means controlled by the reciprocating member for operating the revoluble member to bring a stop in position to arrest the movement of the said reciprocating member.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing Witnesses.

HUBERT BURG. 

